Riveting-hammer.



P. H LE CKI NG E R. RIVETING HAMMER.

APPLICATION FILED JULY 5, I9l3.

1,173,525. Patented Feb. 29,1916.

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PHILIP H. LECKINGER, OF ROCHESTER, NEW YORK.

RIVE'IING-HAMMER.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application filed July 5, 1913. Serial No. 777,504.

drive the hammer so that a variable force may be delivered withoutvarying the power delivered to the driving shaft of the hammer.

Another object of the invention is to build a hammer with an elasticstructure so as to cause it to deliver an elastic blow.

Another object of the invention is to rotate the hammer peen so as tocause it topolish the rivet head at the same time that it is forming it.

These and other objects of the invention will be fully illustrated inthe drawings, described in the specification and pointed out in theclaims at the end thereof.

In the accompanying drawings, Figure 1 is a side elevation of myimproved hammer.

Fig. 2 is a cross section on the line 2- a of Fig. 1. Fig. 3 is aperspective view of the yoke for connecting the hammer peen with thelever or helve of the hammer. Fig. 4 is a vertical section through thebuffers 38 and 39 and the parts associated therewith on the.

eccentric rod 29.

In the accompanying drawings like reference numerals indicate likeparts.

In Fig. 1 reference numeral 1 indicates the base of my improved hammer.2 indicates the frame of the machine having an overhanging arm 3, whichframe is fastened to the base by bolts 4 and 5. 6 is a bracket used forsupporting the main orpower shaft 7 of the machine at one end. 8 is abracket on the frame 2 which furnishes a bearing for the shaft 7 at theother end. The shaft 7 is mounted to rotate in the bearings provided inthe brackets 6 and 8 heretofore described.

As shown in Fig. 2 the shaft 7 has keyed thereto a grooved pulley 9which pulley is placed outside of the bracket 8. On the shaft 7 is aball thrust bearing comprising the washers 10 and 11, which arepreferably hardened, the ball retaining ring 12 and the balls 13 whichare carried in the pockets of the ball retaining ring. The washers 10and 11 and the ball retaining ring 12 are loose in the shaft and arefree to rotate independently thereof.

' Keyed to the shaft is the eccentric sleeve 14. Next to the eccentricsleeve is the friction disk 15 which is also keyed to the shaft.

Next is the flanged driving pulley 16 loosely mounted to turn on theshaft between which and the friction disk 15 is-placed a leather washer17. Next to the flanged pulley 16 is placed the ball bearing having thewashers 18 and 19 and the ball retaining ring 20 and the balls 21, theball bearing being similar in all details to that already described. Thebearing 22 on the bracket 6 is perforated on either side of the bearingfor the shaft 7 and receives two pins therein 23 and 24 which aremounted to slide in the perforations.

The bracket 6 has a lug 25 thereon which is perforated and in which isadapted to slide the rod 26, having a cam plate 27 connected to theupper end thereof. This plate has a cam 28 cut in its inner surfacewhich cam engages with the pins 23 and 24 for the purpose of pushingthem in. The opposite ends of the pins 23 and 24 engage with the washer19 causing the washer and the remaining parts of the ball-bearingtogether with the flange pulley 16 to move into frictional contact withthe friction disk 15 causing the disk 15 to rotate with the flangedpulley 16. This in turn rotates the shaft and the eccentric sleeve 14causing the reciprocation of the eccentric rod 29 fastened to 'theeccentric.

The plate 27 forms a shoulder 30 with a rod 26 between which shoulderand the lug the pins 23 and 24. The upper end of the plate is guided bya screw 32 which engages with the slot in the plate. To the lower end ofthe rod 26 is connected a treadle in any suitable manner by which therod 26 may be drawn down. The eccentric rod 29 is threaded to receivethe nuts 33, 34 and 35 between which nuts are clamped the. cup washers36 and 37 between which are received the rubber buffers 38 and 39between which in turn is clamped the plate 40, which plate is circularand has a flange at the top and the bottom thereof. At pointsdiametrically opposite each other are cut in the plate the recesses 41and 42 with which engage suitable pins or screws carried in the yoke atthe end of the rocker plate 43. This rocker plate 43 has bearings on theopposite side thereof which engage with'the bearing pin 44 carried inthe lug 45 on the frame 2.

Clamped to the rocker plate 43 is the helve 45 by means of a plate 46and bolts 47 and 48 which are threaded into the rocker plate 43. At theouter end of the helve 45 are the cup shaped recesses 49 and 50, oneither side, which receive the rubber balls 51 and 52, which balls areheld in contact with the helve by means of the yoke 53 which yoke has aWasher 54 at the bottom and a cap 55 at the top. The upright portion ofthe yoke is threaded at the top to receive the nuts 56 and 57 by whichthe cap is held on the yoke.

In assembling the hammer head 58 is first passed through the washer 54,the ball 52 is then put in place in the cup provided therefor in the topof the hammer head. The cup shaped recess 50 in the helve 45 is thenbrought down on the ball 52. The ball 51 is put in the cup shaped recess49 and the cap 55 is then placed on the top of the yoke and all theparts are fastened together by the nuts 56 and 57. The hammer head 58 ismounted to slide through the skew gear 59 which has a suitable openingtherethrough with a key therein which engages with the groove or keyway60 in the hammer head which permits the hammer head 58 to reciprocatetherein, but which compels both of them to turn together.

On the bottom of the hammer head is provided the peen 61 which may be ofvarious forms for the different kinds of work to be done, which peen hasa number seven tapered fit with a suitable conical recess in the hammerhead so as to make sufliciently positive engagement therewith permittingthe change of peens for the different classes of work to be done.

The skew gear 59 is driven by a worm 62 carried on the shaft 63 on whichshaft is carried the driving pulley 64 which is driven from the'pulley 9by the belt 65. On the base is mounted the anvil 66 having a block 67therein to hold the work during the operation of the hammer. This block67 is made interchangeable so that different ones may be used.

I claim:

1. A riveting machine comprising a frame, a helve pivoted to the frame,a hammer guided on the frame and having its upper end rotatablyconnected to the helve, a rotary member journaled on the frame andthrough which the hammer is guided at a point below its connection withthe helve,"

a drive shaft, driving connection between the drive shaft and the helve,and driving connection between the rotary member and the drive shaft.

2. A riveting machine comprising. an overhanging arm having a guide atits free end, a hammer movable axially in engagement with said guide, arotary member mounted on.the arm and through which the hammer extends, aslot and key connection between the rotary member and the hammerpermitting the hammer to move axially in said member but causing thehammer to rotate with said member, means for rotating the rotary member,a helve pivotally mounted between its ends on the arm, means foroperatingthe helve simultaneously with the rotation of the rotarymember, and a resili-' ent connection between the upper end of thehammer and the helve, said connection being located entirely above therotary member and having provision permitting the rotation'of the hammerrelatively to the helve.

3. A riveting machine comprising a hammer, a helve pivoted between itsends and having the hammer connected to one end thereof, a reciprocatingrod, a member guided on said rod and pivotally connected to the otherend of the helve, and-elastic buffers arranged on'said rod on oppositesides of the said member.

4. A riveting machine comprising a hammer, a helve, mechanism forrotating the hammer, and a connection between the hammer and the helveembodying a yoke in which the hammer is rotatableand a cushioninterposed between the upper end of the hammer and the helve.

5. A riveting machine comprising a hammer, mechanism for rotating thehammer connected to the latter at a point between the ends of thehammer, a pivoted helve, and a resilient connection between said helveand the hammer on one side of the point Where the rotating meansconnects with the hammer, said connection having provision permittingthe hammer to rotate relatively to the helve.

6. A riveting machine comprising a pivoted helve, a hammer, a resilientmember interposed between one end of the hammer and the helve, and meansconnecting the hammer with the helve, said means having a bearing inwhich the hammer turns below said resilient member, and means actingdirectly on the hammer to turn the latter permit the l'iamrner to turnrelatively to said connecting means, and means acting directly on thehammer to turn the latter in the bearing without turning the connectingmeans.

8. A riveting machine comprising a hammer, means for rotating thehammer,a helve, means for rocking the helve, the opposed faces of thehammer and the helve being provided with cups, a rubber ball fittingsaid cups between the hammer and the helve, and means connecting saidhammer and helve to permit the rockingof the helve and the rotation ofthe hammer.

9. A riveting machine comprising a reciprocating hammer, means forrotating the hammer, a helve, means for rocking the helve, a yoke havinga resilient connection with the helve and connected to the hammer topermit the latter to rotate therein, and a resilient connection betweenthe hammer and the helve permitting the hammer to rotate.

10. A riveting machine comprising a reciprocating hammer, means forrotating the same, a helve, means for rocking the same, a yoke in whichthe hammer is mounted to rotate,a rubber ball interposed-between saidyoke and the upper face of the helve and a rubber ball interposedbetween the under face of the helve and the upper end of the hammer.

11. A riveting machine comprising a hammer, mechanism for reciprocatingthe hammer, a mechanism for rotating the hammer embodying a worm wheelthrough which the hammer is guided, and a worm meshing with the wormWheel, whereby the hammer is positively held in its rotated position.

12. In a riveting machine, the combination of a'frame having bearings, anormally idle shaft mounted to rotate in saidbearings, means for drivingsaid shaft intermittently, an eccentric on said shaft. an eccen-- tricrod reciprocated by said eccentric, Washers on said eccentric rod,elastic buffers adj acent to each of said washers, a plate interposedbetween said elastic buffers, nuts on said rod for holding all of saidparts together and adjusting the elasticity thereof.

13. In a riveting machine, the combination of a frame having bearings, anormally idle shaft mounted to rotate in said bearings, means fordriving said shaft intermittently, an eccentric on said shaft, aneccentric rod reciprocated by said eccentric, washers on said eccentricrod, elastic buffers adjacent to each of said Washers, a plateinterposed between said elastic bufliers, nuts on said rod for holdingall of said parts to-. gether and adjusting the elasticity thereof, ahelve pivotally mounted on the frame of said machine and pivotallyconnected to the plate between the elastic buffers.

14. In a riveting machine, the combina tion of a helve pivotallymounted, a reciprocating device mounted in said machine, a plate on saidreciprocating device to which said helve is connected, elastic bufferson said reciprocating device on each side of 7 said plate, means forclamping said plate and said buffers together. i

In testimony whereof I aflix my signature in presence of tWo witnesses.

PHILIP H. LECKINGER.

I IVitnesses:

BEN FREEDMAN, ISADORE RUBIN.

